Cisco FirePOWER Services Software for ASA: Improper Handling of Undefined Parameters
CVE-2022-20828 is a high-severity improper handling of undefined parameters vulnerability in Cisco FirePOWER Services Software for ASA from Cisco, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 49.3% chance of exploitation within 30 days, which is in the top 1.09% of all scored CVEs.
EPSS places it among the vulnerabilities most likely to be exploited soon.
What to do
- Update Asa Firepower to 6.2.3.19 or 6.4.0.15 or 6.6.7 or 7.0.2.1, whichever matches your release line, or a later version.
- Read the advisory on tools.cisco.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Cisco | Cisco FirePOWER Services Software for ASA | Not specified in the record | Not stated |
| Cisco | Asa Firepower | before 6.2.3.19; 6.3.0 up to, but not including, 6.4.0.15; 6.5.0 up to, but not including, 6.6.7; 6.7.0 up to, but not including, 7.0.2.1 | 6.2.3.19, 6.4.0.15, 6.6.7, 7.0.2.1 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 6.5 | Medium | CNA (cisco.com) |
| CVSS 3.1 | 7.2 | High | NVD |
| CVSS 2.0 | 9.0 | High | NVD |
Official description
A vulnerability in the CLI parser of Cisco FirePOWER Software for Adaptive Security Appliance (ASA) FirePOWER module could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected ASA FirePOWER module as the root user. This vulnerability is due to improper handling of undefined command parameters. An attacker could exploit this vulnerability by using a crafted command on the CLI or by submitting a crafted HTTPS request to the web-based management interface of the Cisco ASA that is hosting the ASA FirePOWER module. Note: To exploit this vulnerability, the attacker must have administrative access to the Cisco ASA. A user who has administrative access to a particular Cisco ASA is also expected to have administrative access to the ASA FirePOWER module that is hosted by that Cisco ASA.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Handling of Undefined Parameters
The product does not handle or incorrectly handles when a particular parameter, field, or argument name is not defined or supported by the product.
More Improper Handling of Undefined Parameters vulnerabilities (CWE-236)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Technical write-ups (may include proof of concept)
- packetstormsecurity.com/files/168256/Cisco-ASA-X-With-FirePOWER-Services-Authenticated-Command-Injection.htmlExploit, Third Party Advisory
- rapid7.com/blog/post/2022/08/11/rapid7-discovered-vulnerabilities-in-cisco-asa-asdm-and-firepower-services-so…Exploit, Third Party Advisory
Other vulnerabilities in Cisco FirePOWER Services Software for ASA
- 7.5 High severity
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